Reversible driving mechanism.



310.815,433. l RATERTED MAR. 2o', v1906.l

M. GfJ'OHNSON. E

REVERSIBLE DRIVING MEGEANISM.

APPLIOATION FILED 00Tl 7. 1904. I

wilma 'To all wiz/0711, t may con/cern.'

.UNITED sTETEs? j MOSES C. JOHNSON, OE HARTFORD, CONNECTICUT, Assis-NOE. To THE PTENT OFFICE.

CARLYLE JOHNSON MACHiNE COMPANY, OE HARTFORD, CONNECTI- a CUT, AKCOEPOEATION OE oHio.

f No. 815,433..

Be it known that I, MosEs C. Jomvsorr,I a citizen of the United States, and a resident of Hartford, in the county of I'Iartford and State of Connecticut, have invented certainv new anduseful Improvements in Reversible Drivin Mechanism, ofwhich the following is a fu l, clear, and exact specification.

This invention relates to reversible driving mechanism, and more 'especially to that class thereof which is generally employed for drivhasfor one of its objectsthe provision ofal v belts for running the driven pu ing machinery from` a line of shafting and it mechanism which will obviate the use of a counter-shaft and its usual open andk cross ley (connected with the driven pulleyv of the machine) in opthe organization of the driven pulley directly uponthe main line of shafting, but normally;

disconnected therefrom, while a suitable clutch may be provided for causing said pulley to be rotated with the line-shaft when required, and-When disconnected from or loose on theshaftsaid pulley may be rotated in av direction opposite fromy another actuator, also` normally loose upon the shaft,butl adapted to be clutched thereto.

Briefly stated, my` invention comprises a pair of pulleys normally loose upon the line-,

shafting and connected bya singleloop-belt in such a manner that the rotation of one will produce a reverse rotation ofthe other, and a suitable clutch mechanism yWherebyreither of said pulleys may be coupled `to the line-shaft or both may bevleftv disconnected therefrom.

My invention has, furthermore, for its object the provisionA of means for properly tensioning the belt which vconnects the pulleys, thus ob'viatin the necessity of shortening the'belt to ta e up slackand at the same time avoiding the' wear andtear incidentalv to an excessively-tight belti .r-

In th drawings, in which similar characters denote similar parts, Figure 1l representsv a fr`ont view Vof my lmprovedmechanism,

. partly in section to disclose the yconstruction y of theolutch device andlfig. 2 is a side'view' a 5cthereof. f

As above stated, my invention has for its` l n primary vobjectia reversible driving kmechanism` which will obviate the use kof acounter- "ber 17,'it foV l anded to engage the hub of the'pul ey 13/the f l Patented March 20, 1906. i

understood that the mechanism may constitutea short line or counter operatedfrom the main lineby one single belt or its equivalent.

the machine which it is desiredto operate and which is preferably secured to a sleeve'V 12, loose upon the shaft 10 and having at one shaft and its connections; but it "should bey 11,-which, may have a belt connection with end av grooved'pulley 13. Also loosely supa ported on the shaft 10 is another grooved pulley 14, which in the present instance is shown as having a larger diameter than the pulley 13 and which isconnected therewithv ya belt-15passing from the pulley 14 over j an idler 16, thence aroundithep'ulley 13, over an idler. 1 6- and back to the pulley 14. From the foregoing it will be clearly seen that if either pulleys 13 or 14be rotated `the other will-movevin the opposite direction`.. v'

In-l order to retain the pulleys 13 14 in proper positions on the shaft longitudinally,

I deem it advantageous to employ a spacing member 17, interposedl between saidpulleys and'coperative` with collars l18 19, secured '.uporr the shaft 10 outside ofthe pulleys A13 14, respectively. Means are provided for clutching either of said pulleys. to rotate with the line-shaft 10, and I accomplish this result in a simple and efficient manner' by the following ymec anism: Byreferring to Fig. 1

it will be seen thatthe hubs of the pulleys 13 14are bored outtoform chambers the bot-k toms of which are in running'contact with the'ends of the spacing memberl 17, rin .the

present instance rigidly secured upon theshaft 10v and carrying at its extremities fixed split friction-rings 20 21, adaptedto engage .with and drive the cupped hubs ofthe pul-` leys 13 14,`respectively. As a matter of fact,

the spacing member constitutes a fixed member which .is keyed to the shaft and which may be clutched to either one of the pulleys 13 14 to impart movement thereto in unison with that of the shaft. Inasmuch as the friction-rings are carried on the body memlows that when the rin `20 is exatter Willbe rotated ,withy the shaft' 10, and

coupled therewith, while the pulley 14 runs as an idler.

Any suitable mechanism may be employed for expanding the friction-rings, the construction illustrated in the drawings comprisinga pair of toggle-arms 24, the free ends of which are adapted to be spread apart by a wedge 25, carried on a spool-collar 26, shiftable longitudinally on the body member 17- as, for instance, by a shipper-lever 27, fulcrumed at 28 and having shoes 29 fitting in the groove 26 on the collar 26. The spool 26 carries also another wedge 30 for operating a pair of toggle-levers 31, whereby the friction-ring 21 may be expanded to engage the hub of the pulley 14, in which case the latter becomes directly coupled to the shaft and through the belt 15 drives the pulley 13 and the cone 11 in an o posite direction and at an increased rate of) speed by virtue of the difference in the diameters of the pulleys 13 14.

The idlers 16 16 are rotatably mounted on studs 35, securedin lugs 36, projecting from tubular hub 37, held for rotatable adjustment and longitudinal movement on a central stem 38, bored to receive a spindle 39. The upper end of the spindle 39 has a collar 40 to support the same in the stem 38, and it is provided near its lower end with a ange 41 to serve as an abutment for a spring 42, the upper end of which rests against the inside of the tubular hub 37, so that the spring constantly tends to raise said hub relatively to the stem 38, which constitutes a trunnion formed on a fixed frame 43, secured to the building by any suitable means. In this manner it becomes evident that the idler-support may not only adapt itself to the pulleys 13 and 14, but will also keep the belt 15 under proper tension, as determined by the spring 42.

Having thus described the invention, what I claim is- 1. In combination with a shaft, drivingpulleys mounted thereon, a stein arranged above the shaft, a hub on the stem, said hub having a rotary and a longitudinal movement on the stem, idlers carried by the hub, a belt passing around the idlers and the pulleys on the shaft, and tension means carried by the hub.

2. In combination with a shaft, drivingpulleys mounted thereon, a stem arranged abovethe shaft, a hub on the stem, said hub having a rotary and a longitudinal movement on the stem, idlers carried by the hub, a belt passing around the idlers and the )ulleys on the shaft, and a spring within the liub arranged to create tension for the belt.

3. In combination with a shaft, drivingpulleys mounted thereon, a stem above the shaft, a flange on the stem, a hub on the stem contacting with the flange, idlers carried by the stem, a belt passing around the idlers and the pulleys on the shaft, and a spring embracing the stem and interposed between an end of the hub and the flange of the stem.

MOSES O. JOHNSON. 

